Friday, December 5, 2014

4100

4100 = 2 x 2 x 5 x 5 x 41.

4100 is 5555 in base 9. It is 12121212 in base 3 (A037480 and A162216).

4100 is a multiple of 5 with a digit sum of 5 (A069540).

4100 has three representations as a sum of two squares (A025286): 4100 = 22 + 642 = 162 + 622 = 402 + 502.

4100 divides 3110 - 1.


Source: What's Special About This Number?

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